diff --git a/pkgs/tools/X11/xpra/default.nix b/pkgs/tools/X11/xpra/default.nix
index fd7f70004db..23270793b34 100644
--- a/pkgs/tools/X11/xpra/default.nix
+++ b/pkgs/tools/X11/xpra/default.nix
@@ -81,5 +81,6 @@ in buildPythonApplication rec {
     description = "Persistent remote applications for X";
     platforms = platforms.linux;
     maintainers = with maintainers; [ tstrobel offline ];
+    license = licenses.gpl2;
   };
 }
diff --git a/pkgs/tools/X11/xpra/gtk3.nix b/pkgs/tools/X11/xpra/gtk3.nix
index 16693b08e11..ceba4269e80 100644
--- a/pkgs/tools/X11/xpra/gtk3.nix
+++ b/pkgs/tools/X11/xpra/gtk3.nix
@@ -68,11 +68,12 @@ buildPythonApplication rec {
   #'';
 
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://xpra.org/;
     downloadPage = "https://xpra.org/src/";
     downloadURLRegexp = "xpra-.*[.]tar[.]xz$";
     description = "Persistent remote applications for X";
-    platforms = stdenv.lib.platforms.linux;
+    platforms = platforms.linux;
+    license = licenses.gpl2;
   };
 }